Comments: ASG is a licensed manufacturer of DS Arms replica airsoft guns, an internationally recognized expert in small arms. The Proline DSA SA-58 OSW Airsoft Rifle illustrates why the DS name has achieved its legendary status. The OSW model boasts a folding skeleton, ambidextrous mag release and a full metal construction. ASG added some of its own flare to the replica as well, including a 6.03mm tightbore inner barrel, high capacity mag and easily accessible hop-up unit. This all adds up to an accurate and devastating airsoft gun. For maximum damage, we recommend 0.20g BBs or heavier.